The purpose of this study is to determine the safety and local tolerability of multiple dose
administration of inhaled OligoG in CF subjects. Particular emphasis will be put on local,
clinical tolerance, pulmonary function and pulmonary adverse events. The secondary purpose is
to monitor the effect of multiple dose administration of inhaled OligoG on various efficacy
variables, such as mucolytic activity, lung function, respiratory symptoms, Quality-of-Life
and microbiological outcome measures.